STMicroelectronics

L9947S

L9947S Description

The L9947S is a high-performance motor driver IC designed for brushed DC motors, manufactured by STMicroelectronics. It features a half-bridge configuration with four outputs and one high-side output, making it suitable for a variety of automotive applications. This IC operates within a supply voltage range of 4.5V to 5.5V and can handle load voltages from 8V to 16V. The L9947S is housed in a 15-lead Multiwatt package and is designed for through-hole mounting, ensuring robustness and reliability in demanding environments. Despite being marked as obsolete, the L9947S remains a valuable component due to its unique features and compliance with industry standards such as REACH and ROHS3.

L9947S Features

• Output Configuration: Half Bridge (4), High Side (1) - This versatile configuration allows for efficient control of brushed DC motors, providing precise control and high reliability.
• Supply Voltage Range: 4.5V to 5.5V - The L9947S is designed to operate within a specific voltage range, ensuring optimal performance and stability.
• Load Voltage Range: 8V to 16V - This wide range allows the IC to handle various motor loads, making it suitable for a broad range of applications.
• Technology: DMOS - The use of DMOS technology provides high efficiency and low power consumption, enhancing overall system performance.
• Compliance: REACH Unaffected, ROHS3 Compliant - These certifications ensure that the L9947S meets stringent environmental and safety standards, making it suitable for global markets.
• Moisture Sensitivity Level (MSL): 3 (168 Hours) - This rating indicates the IC's resistance to moisture, ensuring reliability in humid environments.
• Grade: Automotive - The L9947S is specifically designed for automotive applications, meeting the rigorous standards required for vehicle electronics.
• Package: Bulk - The bulk packaging format is ideal for large-scale production and ensures cost-effectiveness.

L9947S Applications

The L9947S is particularly well-suited for automotive applications where reliability and performance are paramount. Its ability to handle a wide range of load voltages and its robust design make it ideal for driving brushed DC motors in various automotive systems. Specific use cases include:

• Automotive Window Lift Systems: The L9947S can efficiently control the motors used in window lift mechanisms, providing smooth and reliable operation.
• Seat Adjustments: The IC can drive the motors responsible for seat adjustments, ensuring precise control and long-term durability.
• Power Steering Systems: The L9947S can be used in power steering systems to provide reliable motor control, enhancing vehicle handling and safety.
• Electric Mirrors: The IC's ability to handle various load voltages makes it suitable for controlling the motors in electric mirrors, ensuring smooth and reliable operation.

Conclusion of L9947S

The L9947S by STMicroelectronics is a robust and versatile motor driver IC designed for demanding automotive applications. Its half-bridge configuration, wide load voltage range, and DMOS technology provide high efficiency and reliability. Despite being marked as obsolete, the L9947S remains a valuable component due to its compliance with industry standards and its ability to meet the specific needs of automotive systems. Whether used in window lift systems, seat adjustments, power steering, or electric mirrors, the L9947S ensures precise motor control and long-term durability, making it an ideal choice for automotive engineers and designers.